Angular2 "Unexpected value 'null' declared by the module" how to fix?

Question

Angular

When compiling, it gives an error, how to fix it, I just don’t understand what it wants from me

[0] ERROR in Unexpected value 'null' declared by the module 'AppModule in D:/Source/Roulette/src/app/app.module.ts'
[0]
[0] ERROR in ./src/main.ts
[0] Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in 'D:\Source\Roulette\src'
[0]  @ ./src/main.ts 4:0-74

Answer 1

Show the module code

Answer 2

this is a compiler swearing at a (third party) module imported into the AppModule. I already gave up aot. he does not miss too much when compiling. in jit it all works without problems